Method of processing surface of article made from titanium alloy. RU patent 2445406.

FIELD: machine building.

SUBSTANCE: proposed method comprises preliminary preparation of article surface, placing article and current conduction titanium material in processing zone, creating vacuum in said zone, feeding negative potential, separately, to article and current conducting material, firing arc on current conducting material that burns in vapors of said material to produce plasma, bombarding, cleaning and diffusing article surface and accumulating ions of current conducting material on article surface at article surface temperature below that strength loss in article material to produce coating. Two current conducting materials are arranged in processing zone, one of titanium and another one of nickel-based alloy. Accumulation and diffusion of titanium material ions are performed at negative potential at article of 120-200 V in atmosphere of inert gas consisting of the mix of oxygen and argon in (1-2):1 ratio at 0.05-0.3 MPa. Thereafter, reaction gas feed is terminated to excite vacuum arc at second nickel-based material and to accumulate its ions at negative potential of 15-20 V.

EFFECT: higher resistance against holt-salt corrosion and high-temperature oxidation.

2 cl, 1 tbl, 3 ex

IPC classes for russian patent Method of processing surface of article made from titanium alloy. RU patent 2445406. (RU 2445406):

C23C26 - Coating not provided for in groups ; C23C0002000000-C23C0024000000

C23C14/34 - Sputtering

Another patents in same IPC classes:

Laminar material from metal sheets and polymer / 2440246
Invention relates to laminar material made from metal sheets and polymer layer reinforced by fibers and bonded therewith, to be used in aircraft or aerospace engineering. Laminar material comprises at least one first metal layer of invariable thickness of at least 1.5 mm and at least one second of invariable thickness of at least 1.5 mm. Said first and second layers are bonded together by polymer layer reinforced by fibers, volume content of fibers not exceeding 45%. Aforesaid polymer layer comprises reinforcing fibers laid in polymer matrix and selected from the group including fiber glass, carbon fibers, drawn thermoplastic fibers, natural fibers and combinations thereof. Said fibers are impregnated by polymer matrix in partially hardened state.

Complicated profile consisiting of metal profile coated with metal foil / 2439201
Invention is referred to a complicated profile (1), consisting of a metal profile (2) coated with metal foil (3), and a method of coating application on production line by means of the metal foil (4). The method includes subsequent transportation of preliminary cut-out sections of shaped profiles (2) made from plastic or metal. The coating of each shaped profile (2) section with metal foil (3) is ensured to couple the said foil (3) with the said profile (2) in any point of surfaces of metal foil. This coating also ensures detection of the first, the lower by downstream, end (6) and/or the second, the upper by downstream, end (7) of each shaped profile (2) section and their cutting at the level of each end of each shaped profile section. The above metal foil (3) is selected so that its surface hardness could be higher than the hardness of the above shaped profile (2).

Method of surface treatment to protect it / 2439200
Substrate material is coated with a layer containing, at least, one metal for producing the applied layer on the substrate material. In order to produce metal protective layer, the applied layer is then treated thermally in recovering environment at pressure below atmospheric level.

Composition of bath for chemical-thermal treatment of friction surfaces of steel items / 2436867
Composition of bath has following ratio of components, wt %: water 38.0-40.0, caustic soda 40.0-43.0, sulphide soda 1.5-2.5, hypo-sulphurous soda 2.0-3.0, sulphurous titanium 7.0-8.0, copper sulphide 2.5-3.5, potassium 3.0-4.0.

Heat resistant component / 2436866
Heat resistant component contains main part of TiAl of inter-metallic compound having friction surface rubbing against another component and resistant to abrasion coating. Coating is applied on friction surface and is formed by sedimentation in discharge of material of a consumable electrode of metal resistant to abrasion.

Procedure for production of built-up coating on blade body of turbo-machine / 2434973
Strips of alloyed metals are built-up in direction of lengthwise generatrix of blade body ensuring gaps between built-up strips at least on part of blade body and forming layer. As built-up metal there are used alloys on base of nickel with Co, Cr, Al, Mo, W, Ti, Y or their combination. Further, a blade body is mechanically processed ensuring its specified geometry. Successive thermal treatment corresponds to thermo-cycling.

Method of applying cermet coat slurry on turbine stator inner surface / 2433208
Slurry is applied by pouring into stator inner cavity through inlet branch pipe in amount sufficient for complete immersion of guide naves in slurry. Inlet branch pipe is sealed to turn turbine stator about its axis through angle at which inlet branch pipe stays at its bottom position. Then, turbine stator is turned clockwise about axis perpendicular to its axis through angle of inclination to horizon at which slurry does not flows out of turbine stator with inlet branch pipe and guide vanes unsealed. Thereafter, turbine stator is turned about said axis counter clockwise to drain slurry. Now with slurry drained, turbine stator is rotated about its axis with turbine in horizontal position, unless slurry layer water glare disappears.

Method to create surface using discharge / 2432419
Pulse discharge is created between an end surface of an electrode (37) and an end part of a metal plate (11), in order to cause the electrode (37) wear and form a groove (41) in its end surface, shape of which complies with the shape of the end part of the metal plate (11). The relative displacement of the electrode (37) is done in direction perpendicular to the side of the metal plate (11). A pulse discharge is created between the inner side surface of the groove (41) of the electrode (37) and the side surface (11b, 11c) of the end part of the metal plate (11), in order to create an auxiliary coating (43) or (45) at the side (11b, 11c) of the end part of the metal plate (11), and a pulse discharge is created between the lower surface of the groove (41) of the electrode (37) and the upper surface of the end part of the metal plate (11), in order to form a plating layer (47) on the end part of the metal plate (11).

Method of functionalising titanium metal surfaces with titanium nanoparticles and product functionalised using said method / 2432182
Invention relates to treatment of the surface of a titanium article for orthodontic application, used in form of a prosthetic device or component thereof. The method involves immersing the article to be treated in a suspension containing titanium dioxide nanoparticles while ensuring complete wetting of the article, heating the article in order to remove the solvent and performing a thermal cycle in order to fix the nanoparticles on the treated surface of the article.

Procedure for treatment of cutting tool in stationary combined discharge of low temperature plasma of low pressure / 2428521
Tool is positioned in chamber which is vacuumised and is supplied with process gas to working pressure (P). At this pressure there is possible gas break down at minimal strength of electro-magnetic field. Further, positive voltage of bias (U) is supplied on the tool forming electrostatic field around the tool sufficient for maintaining stable generation of plasma and there is generated micro-wave energy to a level of super-high frequency - SHF of power (W) 10-90 Wt. Cutting edges of the tool are subjected to plasma during 1.5-17 minutes (tpr), further, the tool is cooled. Also, during treatment process there is performed control over bias current (I) occurring in a measuring circuit at plasma generation chosen from the range 2÷17 mcA and final lag temperature (T) chosen from the range 10÷230°C. At deviation from the allowed value of bias current (I) the mode of treatment is normalised by changing anode current of a magnetron (Ian). At exceeding the allowed value of final lag temperature (T) treatment of the tool is terminated earlier.

Heat proof coating with gradient of chromium along profile of blade body for protection of blades of gas turbines of internal combustion engines / 2434076
Here is disclosed heat proof coating on base of nickel for blade body of gas turbines and internal combustion engines containing chromium, aluminium and yttrium. Contents and ratio of chromium and aluminium in coating varies along profile of the blade body. Also, coating contains wt % in entrance edge 1 of the blade: nickel 65.7, aluminium 10, chromium 24, yttrium 0.3, while coating contains wt % in exit edge 3 of the blade: nickel 65.7, aluminium 12, chromium 22, yttrium 0.3. Coating of suction face 2 contains wt %: nickel 65.7, aluminium 6, chromium 28, yttrium 0.3. Coating of pan 4 of the blade contains wt %: nickel 65.7, aluminium 4, chromium 30, yttrium 0.3.

Procedure for item coating and item / 2432418
On base there is applied layer of aluminide modified with platinum of formula PtMAl, where M corresponds to metals iron (Fe), nickel (Ni) or cobalt (Co) or combination of these metals. A layer is created by physical sedimentation from vapour phase (PVD). At least both components, aluminium (Al) and metal (M), are physically settled from vapour phase at process pressure at least 0.1 mbar, preferably, at least 0.4 bar and, in particular, between 0.4 mbar and 0.6 mbar.

Procedure for application of wear resistant coating on blades of compressor of gas turbine engine (gte) / 2430992
Procedure consists in sedimentation of alternate layers of metals and their nitrides at cleaning surface of blades with ions of argon and in ion implantation in process of sedimentation. Blades are preliminary polished and cleaned in an ultra-sonic bath. Blades are cleaned with argon ions by means of gas plasma produced by supply of short-pulse high frequency high voltage negative potential of bias on blades. Further, argon plasma is changed to nitrogen plasma and ion implantation of nitrogen is performed with the same parameters of bias potential. Generation of nitrogen plasma is interrupted, and there is produced plasma of titanium; it is purified from micro-particles and bias potential is supplied on blades with the same high frequency parametres facilitating implantation of titanium ions into a surface layer and blades heating, when blades reach temperature required for coating sedimentation. With reduced bias potential an under-layer of titanium is applied on blades. Alternated layers of titanium nitride and titanium-aluminium nitride are settled; notably, the layer of titanium nitride is settled at production of nitrogen plasma, while the layer of titanium-aluminium nitride - at titanium-aluminium plasma.

Device to apply coats on diamond powders / 2426623
Invention relates to device intended for applying coats on diamond powders. Proposed device comprises loading rotary powder dispenser, magnetron, anode to spray coat material and driven powder mixer that doubles as holder. The latter is made up of conical drum consisting of conical segments partially overlapping each other in one direction with clearance arranged between them to produce difference between surfaces of said segments to intensify powder mixing in one rotational direction of said drum and discharging metalised powder in changing said direction.

Procedure for cutting tool multi-layer coating / 2414531
Here is disclosed procedure for application of two-layer coating of working surfaces of cutting tool by vacuum-plasma procedure. Also, as a lower layer there is applied titanium and molybdenum nitride, or titanium and chromium nitride, or titanium and niobium nitride. As an upper layer there is applied titanium and molybdenum carbonitride or titanium and chromium carbonitride, or titanium and niobium carbonitride additionally alloyed with aluminium.

Procedure for cutting tool multi-layer coating / 2414530
Two-layer coating is applied on working surfaces of cutting tool by vacuum-plasma procedure. As an upper layer there is applied titanium and molybdenum carbonitride or titanium and chromium carbonitride, or silicon and titanium carbonitride, or titanium and aluminium carbonitride, or titanium and iron carbonitride, or titanium and zirconium carbonitride. As a lower layer there is applied titanium and molybdenum nitride or titanium and chromium nitride, or silicon and titanium nitride, or titanium and aluminium nitride, or titanium and iron nitride, or titanium and zirconium nitride alloyed with niobium.

Procedure for cutting tool multi-layer coating / 2414529
Two-layer coating is applied on working surfaces of cutting tool by vacuum-plasma procedure. As an upper layer there is applied titanium and molybdenum carbonitride, or titanium and niobium carbonitride. As a lower layer there is applied titanium and molybdenum nitride, or titanium and niobium nitride alloyed with chromium.

Procedure for cutting tool multi-layer coating / 2414528
Two-layer coating is applied on working surfaces of cutting tool by vacuum-plasma procedure. As a lower layer there is applied titanium and molybdenum nitride or titanium and chromium nitride, or titanium and niobium nitride. As an upper layer there is applied the same nitride alloyed with silicon. Also, at application of layers temperature of condensation and pressure of nitrogen are different in each layer.

Procedure for cutting tool multi-layer coating / 2414527
Two-layer coating is applied on working surfaces of cutting tool by vacuum-plasma procedure. As a lower layer there is applied titanium and silicon nitride or titanium and chromium nitride, or titanium and niobium nitride, or titanium and aluminium nitride, or titanium and iron nitride, or titanium and zirconium nitride. As an upper layer there is applied the same nitride alloyed with molybdenum. Also, at application of layers temperature of condensation and pressure of nitrogen are different in each layer.

Procedure for production of multi-layer coating for cutting tool / 2413789
Two-layer coating is applied on working surfaces of cutting tool by vacuum-plasma procedure. Carbonitride of titanium and molybdenum, or carbonitride of titanium and niobium are applied as a lower layer. Nitride of titanium and molybdenum, or nitride of titanium and niobium alloyed with chromium are applied as an upper layer.

Porous gas-absorbing units at reduced loss of particles and method of manufacture of such units / 2253695
Proposed method includes forming of coat at thickness of at least 0.5 mcm on surface of porous gas-absorbing body. Coat is formed from material compatible with conditions of use of gas-absorbing unit and selected from transition metals, rare-earth elements and aluminum by evaporation, sedimentation of plasma generated by arc discharge , sedimentation from ion beam or cathode sedimentation; particles of gas-absorbing body are coated by applying partial coat on external surface of gas-absorbing body.